Evaluate the algebraic expression for the given value(s) of the variable(s).
; a = 7
A. 
B. - 
C. - 
D. 
Answer: C
Mathematics
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Verify the identity.sin 4x = 2 sin 2x cos 2x
What will be an ideal response?
Mathematics
Estimate the probability of an event (empirical probability). You toss two fair coins 20 times and obtain the following results for the number of tails.
Estimate the probability that when the two coins are tossed exactly one will be tails.
A. 
B. 
C. 
D. 
Mathematics
Graph the system of inequalities.y ? -2x + 4x ? 1
A. 
B. 
C. 
D. 
Mathematics
Solve.4(2t - 5) - 8 = 28
A. 8 B. 7 C. 9 D. 6
Mathematics